Advanced PlacementCollege / Chemistry

Kinetics of Crystal Violet Fading (Spectrometer)

Students determine the reaction order of crystal violet fading in the presence of sodium hydroxide.

This version of the experiment is conducted with a wireless spectrometer. A calibration curve of crystal violet is generated and optimal absorbance wavelength determined by the student. Crystal violet fading is investigated using different concentrations of sodium hydroxide.


Student Files

11B_ACI_Kinetics_of_Fading_Spectrometer_S.docx 1.21 MB
11B_ACI_Kinetics_of_Fading_Spectrometer_S.pdf 1.54 MB

Teacher Files

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Standards Correlations

IB Topics AP Topics
6.1; 16.1; 16.3 TRA-3.B; TRA-3.C; TRA-3.A

Featured Equipment


Wireless Spectrometer (VIS)

Measure intensity, absorbance, transmittance across the visible spectrum, and fluorescence at 405nm and 500nm.

Many lab activities can be conducted with our Wireless, PASPORT, or even ScienceWorkshop sensors and equipment. For assistance with substituting compatible instruments, contact PASCO Technical Support. We're here to help.

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Source: Lab #11B

Advanced Chemistry through Inquiry

Kinetics of Crystal Violet Fading (Spectrometer)